Montreal is bracing for a dramatic shift in weather conditions, as a significant rainfall event is set to interrupt the city’s recent streak of sunshine, high UV and an intense two-day heat wave. As of early Friday morning, Environment Canada has issued a special weather advisory for much of Southern Quebec, including Montreal, warning of widespread rain and the potential for thunderstorms.
Heavy precipitation expected from Friday through Sunday
According to the statement, rainfall totals between 25 and 50 millimetres are expected between Friday evening and Sunday morning. Some areas within the Greater Montreal Area could experience even higher amounts if thunderstorms intensify.
Environment Canada describes the incoming system as a vigorous low-pressure area that will sweep across Southern Quebec. The heaviest rainfall is anticipated from Friday evening through Saturday evening, a 24-hour period that could deliver nearly half of Montreal’s average June rainfall in just one day.
Regions under advisory
The weather advisory covers a large portion of southwestern Quebec, including Montreal, Montérégie, Outaouais, Laurentians, Lanaudière, and the Eastern Townships. These areas are at risk of localized flooding, especially in low-lying zones, where water may accumulate rapidly. Rivers across these regions may also experience increased flow and rising levels, prompting concerns for areas near waterways.
Forecast for Montreal this weekend
Friday, June 27 is expected to remain mostly cloudy, with temperatures peaking at 26 °C (79 °F). Evening showers or thunderstorms are likely, with rainfall between 10 and 20 mm.
Saturday, June 28 brings continued rain and a high of 23 °C (73 °F), with a humidex of 30. Showers are forecast to persist into the night, and the city could see the highest rainfall totals during this time.
Sunday, June 29 offers a brief reprieve, as skies begin to clear and the temperature returns to 26 °C (79 °F), with a mild overnight low of 20 °C (68 °F).
Impacts and considerations
While this weather system brings much-needed moisture after several hot and dry days, it also poses risks to urban drainage systems, outdoor events, and travel plans. Motorists and residents should remain alert for rapid changes in weather and ponding water on roads and sidewalks.
The special advisory remains in effect as of Friday morning, and updates from Environment Canada are expected throughout the weekend as the system evolves.
